Collapsible nursery stand

ABSTRACT

Collapsible nursery stand comprising a pair of scissor action side frames each comprising a pair of limbs (6, 8) from upper regions of which U-shaped link members depend which swingingly support a carry-cot (36) or the like. The link members may be interconnected by a frame (22) for holding the carry-cot (36). On each side of the stand a strut (50) extends between the limbs (6, 8) to hold the stand in an erected configuration so that the carry-cot (36) can swing on the links. Each strut includes a securing means which can be released to permit the stand to collapse. Lower ends of the links move towards each other as this occurs. The securing means may comprise a plate (49) with a track (54), a pair of telescoping members, a hooked bar, an over centre latch mechanism or a strut which is slidingly engageable with one limb member.

The present invention relates to a collapsible stand suitable forsupporting a carry-cot or Moses basket.

A typical prior art carry-cot stand is described in GB-A-2214421. Thisstand includes a pair of scissor action side frames each of which isprovided with a two-part arm, the ends of which are pivotally connectedto a different limb of one of the scissor action side frames. As theframe is opened, the two arms are reconfigured from a doubled upconfiguration to an extended configuration in which arm parts aresubstantially aligned. Place a carry-cot into an upper region of thestand urges upper portions of each side frame apart thus placing thearms in tension. Once the arms have reached a straight configuration,tension in the arms resists further opening of the side frames. Onedisadvantage is that this arrangement does not permit the carry-cotsupported by the stand to be rocked.

Cots which permit rocking exist but they are not easily foldable into asubstantially flat configuration so as to facilitate transportation andstorage. Such cots are described in U.S. Pat. Nos. 2,482,318 and1,336,302.

The object of the invention is to provide a stand suitable forsupporting a carry-cot which both allows the carry-cot to be swung andallows the stand to be easily folded flat when not in use.

A further object of the invention is to provide a carry-cot stand whichdoes not require disengagement of any of its parts prior to being foldedflat.

Thus according to the invention there is provided a collapsible nurserystand comprising a pair of interconnected scissor action side frameseach comprising a pair of limbs and securing means which in a firststate secures the stand in an erected configuration and in a secondstate permits the stand to be collapsed, characterised in that the standfurther comprises link means which depend from upper regions of thelimbs when the stand is erected for swingingly supporting infantaccommodating means.

By providing links which can swing with respect to the limbsconstituting the side frames, for supporting infant accommodating means,such links can easily be oriented towards alignment with the limbs whenthe stand is collapsed. Accordingly, such a stand can easily, withoutdisengagement of any parts from the stand, be reconfigured between anerected and a collapsed state.

In order to provide an easy swinging action the link means preferablydepend substantially vertically when the stand is erected and standingon level ground.

The link means preferably rotate through an angle of at least 45° andmore preferably through an angle of at least 60° as the stand iscollapsed to a configuration in which side frame limbs lie substantiallyon closely adjacent approximately parallel planes.

So that depending portions of the link means connected to differentlimbs of each side frame can be interconnected (for example by a frameor platform) while permitting collapsing of the frame withoutdisassembly being necessary, preferably upper regions of the limbs ofeach side frame move away from each other as the stand collapses.

So as to reduce the number of parts comprised in the stand and so as toincrease its rigidity the pair of scissor action side frames arepreferably interconnected by two substantially U-shaped link members.For the same reasons the scissor action side frame preferably comprise apair of substantially U-shaped frame members with pivotallyinterconnected limbs.

When the link means comprises a pair of U-shaped link members the standpreferably includes spacer means for supporting the infant accommodatingmeans clear of a base portion of each link member in order to reducefrictional forces tending to damp any swinging action of the link means.

Preferably the stand includes a structure interconnecting the link meansassociated with the upper regions of the limbs of each side frame. Sucha structure will increase the rigidity of the stand, facilitateautomatic rotation of the link means as the stand is collapsed and canalso be conveniently provided in the form of a frame for restrainingmovement of a typical infant accommodating means, such as a carry-cot,with respect to the link means. In order for the structure to restrainsuch movement effectively it preferably has raised ends.

Preferably the structure is adjustable in length in order to cater fordifferent sized infant accommodating means and variable fixing means areprovided for variation of the location at which at least one link of thelink means is secured to the structure. With such an arrangement,depending portions of the link means can be arranged to dependsubstantially vertically regardless of the length of infantaccommodating means being supported.

In order to increase the stability of the stand when erected preferablyeach first and second limb of one side frame is connected to a first andsecond limb respectively of the other side frame by a cross-member.Conveniently, each cross-member may engage the ground when the stand isin use and interconnect two limbs on opposite sides of the stand, thusforming a U-shape. In this way the side frames can comprise twohingeably interconnected U-shaped structures each formed in one piecefrom a tube or bar.

In order to still further increase the rigidity of the stand when it iserected the securing means preferably comprises a securing meansassociated with each side frame. By providing two independent securingmeans the safety of the stand will be increased because if one securingmeans is accidentally released the stand will remain supported by theother.

As there will normally be a load tending to collapse the stand whenthere is a requirement to secure it in its erected configuration thesecuring means may conveniently be provided by an over-centre latchmechanism. An elegantly simple form of over-centre latch mechanism maybe provided by two pivotally interconnected latch members each of whichis pivotally connected to a different limb of one side frame. To reducethe chance of such an over-centre latch mechanism being accidentallyunlatched one of the latch members is preferably angled.

Conveniently the securing means comprises a strut interconnecting thelimbs of one side frame and in order to avoid the necessity ofdisengaging one end of the strut from the frame to allow it to collapse,preferably the strut is connected to a first one of the limbs by a pivotand to a second one of the limbs of the side frame by a slidingarrangement. Such an arrangement will allow the struts to remainconnected to both first and second limbs throughout collapsing of thestand.

One sliding arrangement which is particularly straightforward tomanufacture and use is one which comprises a slider connected to thesecond limb which engages a track-way connected to the strut. Byconfiguring the track-way so that it includes substantially straightshorter and longer track sections interconnected by a cross-tracksection, disengagement of the securing means to allow the stand tocollapse or engagement of the securing means upon erection of the standto the required height can be easily provided.

Alternatively the sliding arrangement may comprise a carriage connectedto the strut which is displaceable along The second limb and a lockingdevice for preventing such displacement when the stand is erected.

So that the strut may be pivoted to a fixed point on each limb the strutmay be adjustable in length.

An even simpler securing means, which does require one end of the strutto be disconnected from its associated limb, is one including a strutpivotably connected to one limb and selectively engageable with theother limb of the side frame.

The invention also provides a collapsible stand as described above incombination with an infant accommodating means such as a carry-cot orso-called Moses basket. As an alternative to providing a carry-cot whichcan be lifted on and off the support frame the links may be connecteddirectly to a crib which may itself be collapsible.

The invention will now be described by way of example only withreference to the following drawings in which:

FIG. 1 is a side elevation of a stand according to the invention in anerected configuration;

FIG. 2 is a top plan view of the stand shown in FIG. 1;

FIG. 3 is an end elevation of the stand shown in FIG. 1;

FIG. 4 is a side elevation of the stand shown in FIG. 1 in the processof being collapsed;

FIG. 5 is a side elevation of the stand in its collapsed configuration;

FIG. 6 is a top plan view of the stand shown in FIG. 5;

FIG. 7 is an end view of a clip used in the assembly of the stand;

FIG. 8 is a side view of the clip shown in FIG. 7;

FIG. 9 is a side elevation of a second embodiment of a stand accordingto the invention in an erected configuration;

FIG. 9A is a side elevation of the stand shown in FIG. 9 in the processof being collapsed;

FIGS. 10, 11 and 12 are partial side elevations of three furtherembodiments of the invention employing alternative securing means;

FIG. 13 is a perspective view of the securing strut shown in theembodiment of FIG. 12; and

FIG. 14 is a partial side elevation of a further embodiment of theinvention.

The stand shown in FIGS. 1 to 6 includes two U-shaped frame members 2and 4, each of which includes a pair of spaced substantially parallellimbs 6 and 8. Each limb 6 of the frame member 2 is pivotally connectedto an adjacent limb 8 of the other frame member 4 by means of a bolt 10,rivet or some other suitable means which is positioned approximatelycentrally on its associated limbs 6 and 8. A pair of pivotallyinterconnected frame limbs 6 and 8 constitute a scissor action sideframe.

Distal ends of the limbs of each frame member 2 and 4 are interconnectedby a shallow substantially U-shaped link member 12. Each link member 12includes a central flat portion 20 with upstanding legs 16 at each end,the upper end of each of which is connected to an upper end of a sideframe limb 6, 8 by an upper link pivot pin 18. When the frame iserected, the flat portions 20 of each link member 12 will besubstantially horizontal and the upstand legs 16 will dependsubstantially vertically as seen in FIG. 1, and converge towards theirlower ends as shown in FIG. 3. The flat portion 20 of each link member12 is connected to a tubular substantially rectangular support frame 22by means of two lower link pivot attachment clips 24 which are shown indetail in FIGS. 7 and 8. Each clip 24 includes a link recess 38 at itslower end which snap-fits over the flat portion of a link member 12, anda frame recess 40 at its upper end in which the support frame 22snap-fits. A cylindrical lug 42 projects from an inner region of eachframe recess 40 and snugly engages a complementary hole (not shown) in alower surface of the support frame 22. This arrangement is particularlyadvantageous for holding the support frame 22 and the link members 12 ina fixed juxtaposition and makes accidental or intentional separation ofthe clips 24 from the support frame 22 very unlikely. Confronting facesof the clips 24 are provided with spacer recesses 44 which accommodate aspacer bar 46, as shown in FIG. 3. The purpose of the spacer bar 46 isto support the carry-cot 36 clear of the flat portions 20 of the linkmembers 12, thus avoiding friction between an underside of the carry-cotand the link members impeding the swinging action of the link members12.

A substantially U-shaped guard 48 is rotatable about upper ends of thelink upstand legs 16 at each end of the stand between a stowed positionshown in FIG. 6 and a deployed position shown in FIGS. 1 and 2. Thepurpose of the guard is to limit the extent of swinging of the carry-cotand to prevent swinging of the carry-cot from being caused accidentallyby a person knocking into the carry-cot for example. For the sake ofsimplicity the guards 48 have been omitted from the other views of thestand.

In the embodiment shown in FIGS. 1 to 6, each pair of interconnectedside frame members 6 and 8 are provided with an over-centre latchmechanism 26 positioned a little way above the pivot bolt 10. Each latchmechanism 26 includes a longer angled arm 28 of circular cross-sectionand a shorter straight arm 30 which is channel shaped in cross-section.Adjacent ends of the arms 78 and 30 are pivotally interconnected by apin 32 and the other ends of the longer and shorter arms are pivotablyconnected to side frame limbs 6 and 8 on one side of the standrespectively by bolts 34. A shorter section 29 of the angled arm 28 isapproximately the same length as the straight arm 30 and is adapted tonest inside the channel section constituting the straight arm 30 whenthe stand is erected.

In use, the frame is configured as shown in FIGS. 1 to 3 with the sideframe limbs 6 substantially perpendicular to the side frame limbs 8. Thelatch mechanism 26 on each side of the stand will be locked in place asdescribed above and as shown in the drawings and a carry-cot 36 or Mosesbasket will be retained securely on the stand by being placed betweenraised end portions 23 of the support frame 22. The guards 48 will berotated out to their extended positions. The link upstand legs 16 of thetwo link members 14 hold the support frame in such a manner that rockingof the carry-cot 36 in the direction of arrow A is possible.

When there is a requirement to collapse the stand the carry-cot 36 willbe lifted off. The guards 48 will be rotated inwardly and the two latchmechanisms 26 will be released by upward pressure in the region of thetwo arm pivot pins 32. As the stand collapses towards the configurationshown in FIG. 4 the angle between the latch mechanism arms 28 and 30 ofeach latch mechanism will open up and the upper ends of the link upstandlegs 16 will pivot outwardly about an axis defined by the flat portion20 of the link members. The consequent separation of the upper ends ofthe link upstand legs 16 caters for separation of the upper link pivotpins 18 on each side of the stand which occurs as the stand collapses.Accordingly, without separating any stand components the stand can becollapsed to the configuration shown in FIGS. 5 and 6. It should benoted that once the latch mechanisms 26 have been released the standcollapses of its own accord under the action of gravity.

Rotation of each link upstand leg by approximately 75° as collapsing ofthe stand occurs obviates the necessity to disconnect the support frame22 from one link member 12 or any other part of the stand. The combinedlength of the two link upstand legs 16 is selected to be substantiallyequal to the distance that the upper link pivot pins 18 on one side ofthe stand separate as the stand is collapsed from the erectedconfiguration shown in FIG. 1 to the collapsed configuration shown inFIG. 5.

Erection of the stand is a straightforward reversal of the collapsingprocedure described above. Lifting of the stand by means of the frame 22results in the limbs 6 and 8 moving to the position shown in FIG. 1 atwhich point the over-centre latch mechanisms 26 will move automaticallyunder the action of gravity towards the configuration shown in FIG. 1.Once this has occurred, by pressing the pins 32 of the over-centre latchmechanisms 26 downwardly, they will snap into the configuration shown inFIG. 1.

Various alternative latch mechanisms are shown in FIGS. 9 to 12.

In the arrangement shown in FIG. 9 each scissor action side frame isprovided with securing means 49 comprising a strut 50 which is pivotedto one limb 6 by a pivot pin 52 and has a trackway 54 at its other endwhich is slidingly engaged by a slider 56 projecting from the limb 8.The trackway includes upper 58 and lower 60 substantially horizontallydisposed track sections interconnected by a short vertical cross-tracksection 62. The track sections are juxtaposed in a U-shape with thelower track section 60 extending further from pivot pin 52 than theupper track section 58. In use, tension in the strut 50 urges the slider56 towards the end of the upper track section 58 furthest from thecross-track section 62.

When there is a requirement to collapse the stand, the carry-cot 36 islifted out of the frame 22 and the stand is raised slightly by liftingcentral regions of the struts 50. Due to the weight of the portions ofthe stand below the bolts 10, the two upper parts of the limbs 6, 8 ofeach side frame rotate towards each other, and the slider 56 movestowards and eventually drops into the cross-track section 62. The standis then lowered to the ground and further lowering of the struts 50permits the end portions of the limbs of each side frame to move awayfrom each other. As this occurs the slider moves along the lower tracksection 60 towards its distal end as shown in FIG. 9A. The length ofthis lower track section permits the stand to collapse into asubstantially flat configuration. Rotation of the upper ends of the linkmembers 12 away from each other about the link flat portions permitsthis collapsing to occur without any detaching of the support frame 22being necessary.

In order to erect the stand, the support frame 22 can simply be lifteduntil the cross-track section 62 of the strut 50 drops over the slider56. This allows the slider to enter the upper track section 58 alongwhich the slider 56 passes as the stand is lowered onto the ground andthe support frame released.

A third embodiment is shown in FIG. 10 with a further alternative latchmechanism. In this embodiment a telescopic strut 64 is provided whichincludes an inner section 70 with an outwardly biased spring-loadedbutton 66 and an outer section 72 with a hole 68 through which thebutton 66 pops when the inner and outer sections 70, 72 have beentelescoped together to a sufficient extent by erection of the stand. Thedistal end of each strut section is connected to an upper region of astand limb 6, 8 by a pivot bolt 74. The lengths of the strut sectionsare such as to permit the stand to collapse to the configuration shownin FIG. 5 without becoming disengaged from each other.

A fourth embodiment is shown in FIG. 11 which employs a latch mechanismon each side of the stand in which a sliding strut 76 is employed. Oneend of the sliding strut 76 is pivoted to a fixed bracket 78 securednear an upper end of one limb 6 and the other end is pivoted to asliding bracket or carriage 80 which is held in the position shown inFIG. 11 by a spring-loaded detent or locking device 82 engaging a pin 84on the sliding bracket. When there is a requirement to collapse thestand, the detent is released and the sliding bracket 80 slides down theupper portion of limb 8 towards the limb pivot bolt 10.

A fifth embodiment is shown in FIG. 12 in which the latch is constitutedby a hooked strut 86, the shape of which is shown in the perspectiveview shown in FIG. 13. The strut 86 is pivoted to the side frame limbs 8by pivots 90 and has a hooked end 92 for engagement with a cross-bar 88which extends between the two side frames. When there is a requirementto collapse the stand, the hooked end 92 is disengaged from thecross-bar 88 and the stand is allowed to collapse.

In the embodiment shown in FIG. 14, the stand has a telescopicallyadjustable support frame 94 comprising two interengageable parts whichare U-shaped when viewed from above. The telescopic interengagement ofthe two parts is shown in FIG. 14. An outer section 96 has a series ofholes 98 through one of which an outwardly spring-loaded button 100mounted on an inner section 102 projects. The flat portion 20 of eachlink member 12 is snap-engaged in one of three slots 104 in a linksecuring clip 106 at each side of the telescopic frame 94. In FIG. 14,the telescopic frame is telescoped in to its minimum length (L). Ifthere is a requirement for the length of the telescopic frame to beextended, for example if a longer carry-cot is to be accommodated, itwill be necessary to locate the link members 12 in different slots 104in the link securing clips 106 in order that the link upstand legs 16can both depend vertically when the carry-cot is not swinging.

In the embodiment shown in FIGS. 10 to 14, the lower portions of thestand and the manner in which the stand components move relative to eachother is the same as for the embodiments described above and haveaccordingly not been described in detail.

I claim:
 1. Collapsible nursery stand comprising a pair of interconnected scissor action side frames each comprising a pair of limbs and securing means which in a first state secures the stand in an erected configuration and in a second state permits the stand to be collapsed, wherein the stand further comprises link means including at least two link members supported at respective pivot connections on the limbs and which depend from upper regions of the limbs when the stand is erected for swingingly supporting infant accommodating means and a structure attached to and interconnecting the link members at locations distal from the pivot connections which structure causes automatic rotation of the link members as the limbs of the side frames are pivoted relative to each other to collapse the stand.
 2. The stand of claim 1 wherein the link means (12) depend substantially vertically when the stand is erected.
 3. The stand of claim 1 wherein the link means (12) rotate through at least 45° as the stand collapses.
 4. The stand of claim 1 wherein the upper regions of the limbs (6, 8) of each side frame move away from each other as the stand collapses.
 5. The stand of claim 1 wherein the link means comprises two substantially U-shaped link members (12) each of which extends between the two side frames.
 6. The stand of claim 5 further including spacer means (24, 46) for supporting the infant accommodating means (36) clear of a base portion (20) of each link member.
 7. The stand of claim 1 wherein the structure comprises a frame (22).
 8. The stand of claim 1 wherein the structure (22) has raised ends (23) for restraining movement of the infant accommodating means (36) relative to the structure (22).
 9. The stand of claim 1 wherein the structure (94) is adjustable in length in order to cater for different sized infant accommodating means (36).
 10. The stand of claim 9 including variable fixing means (104, 106) for permitting variation of the location at which at least one link (12) of the link means is securable to the structure (94).
 11. The stand of claim 1 wherein each first and second limb (6, 8) of one side frame is connected to a first and second limb (6, 8) respectively of the other side frame by a cross-member (9).
 12. The stand of claim 1 wherein the securing means (26, 49 . . . ) includes a separate securing means associated with each side frame.
 13. The stand of claim 1 wherein the securing means comprises at least one over-centre latch mechanism (26).
 14. The stand of claim 1 wherein the securing means comprises a strut (28, 50, 64, 76, 86) interconnecting the limbs (6, 8) of a side frame.
 15. The stand of claim 14 wherein the strut (50, 64, 76) is connected to a first one of the limbs (6, 8) of one side frame by a pivot (52, 74, 83) and to a second one of the limbs (6, 8) of said one side frame by a sliding arrangement (54, 70, 80).
 16. The stand of claim 15 wherein the strut (50, 64, 76) remains connected to both first and second limbs (6, 8) throughout collapsing of the stand (1).
 17. The stand of claim 15 wherein the sliding arrangement comprises a slider (56) connected to the second limb (8) which slidingly engages a trackway (54) connected to the strut (50).
 18. The stand of claim 17 wherein the trackway (54) includes substantially straight longer (60) and shorter (58) track sections interconnected by a cross-track section (62).
 19. The stand of claim 15 wherein the sliding arrangement comprises a carriage (80) connected to the strut (76) which is displaceable along the second limb (8) and a locking device (82) for preventing such displacement when the stand is erected.
 20. The stand of claim 14 wherein the strut (86) is connected to a first limb (8) of one side frame by a pivot (90) and is detachably securable to the second limb (6) of said one side frame.
 21. The stand claim 14 wherein the strut (64) is adjustable in length. 